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[v1-00] 2015-Apr-01 Document Feedback HLS-440P Automotive Hydrogen Leak Sensor The HLS-440P automotive hydrogen sensor monitors hydrogen leakage concentrations of 0 - 10% in air. The design fulfills Zone 2 requirements according to ATEX 100a. The predicted concentration is transmitted to the host via the CAN bus interface or with PWM output. Type A: The sensor shall measure the hydrogen concentration in high humidity conditions, e.g. in the exhaust of a fuel cell system, to ensure compliance with defined upper thresholds. Type B: The sensor shall measure the hydrogen concentration under ambient humidity conditions, to ensure compliance with defined upper thresholds. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of HLS-440P , Automotive Hydrogen Leak Sensor are listed below: Figure 1: Added Value of Using HLS-440P Benefits Features
- High sensitivity over large concentration range
- 0 – 10% H 2 in air or nitrogen
- Accuracy ±0.5% vol.
- Resolution 500ppm
- Low cross sensitivity • Heated field-effect transistor technology
- N o d e t e c t i o n t o w a r d s H C , H2S, N2, CO, CO2, NOx
- Designed for humid environment
- Humidity influence <0.5% typical
- Operating humidity range 5–100% relative humidity including condensation
- Fast response time
- S t a r t - u p t i m e < 5 s
- Speed of response (t 90) < 5s
- Speed of recovery < 5s
- CAN bus interface 500 kbit/s (ISO11898-2)
- P W M o u t p u t ( o p t i o n a l )
- Low power consumption • 70 mA (typical)
- Long-term stability and reliability
- ESD and EMC protection
- Operating temperature range –40ºC to 90ºC
- Operating pressure range 0.5 – 1.2 bar (absolute) General Description
Document Feedback [v1-00] 2015-Apr-01 HLS-440P − General Description
Applications
Detection of hydrogen gas leaks in fuel cell systems and other in-process applications. Block Diagram The functional blocks of this device for reference are shown below: Figure 2: HLS-440P Block Diagram
- Safety integrity level and explosion proof • Designed for SIL2 (IEC 61508) and ATEX 100a zone 2
- L o n g l i f e t i m e • IP6K7 and IP6K9K qualified with expected lifetime of 10 years Benefits Features Power Supply LDO Voltage Regulation EMC Filter Protection Overvoltage, reverse polarity Heater Switch Resistor H2-SensorTimer μController Wa tchdog Output Switch Connector
[v1-00] 2015-Apr-01 Document Feedback HLS-440P − Overview Figure 3: HLS-440P Overview Overview Process Connection Power & CAN Bus Connector
Document Feedback [v1-00] 2015-Apr-01 HLS-440P − Overview Installation The HLS-440P is designed for process connection with metric straight screw thread with o-ring M14x1.5 in accordance with ISO 6149-3 (stud end) and to fit into ISO 6149-1 (port). The HLS-440P can also be mounted on a holder for open-air application. EPDM 70 “Peroxide crosslinked” or FPM 75 (Viton) Recommended torque for fixati on: 15 Nm (+10% -0%) acc. ISO 6149-3 Recommended orientation of the sensor, see below. Figure 4: Recommended Mounting Position of the Sensor
Document Feedback [v1-00] 2015-Apr-01 HLS-440P − Electrical Interface CAN Bus Interface This section describes the CAN bus interface that is available in some variants of HLS-440P . Physical Interface The physical interface is two-wire balanced. It is a high speed CAN interface (ISO 11898-2) with bus bit rate at 500 kbit/s. Type A: 120 Ohm CAN bus termination Type B: no termination CAN Matrix HLS-440P HLS-440P will send the first CAN message 0.1 s after start-up. The repetition rate of the CAN message is 100ms ±2ms. The first H2 concentration will be delivered after 5 s. The CAN messages prior to that will have the "Not _ready" bit set, indicating that the concentration value of the message is not valid. I n c a s e o f a w a r m r e s t a r t ( < 5 s ) e r r o r c a t e g o r y 1 w i l l b e s e t f o r 1 0 s . The Msg Counter increments with each CAN message. Each CAN message is sent twice. Th e first time it is sent with ID 1592 (0x0638) for type A and 1600 (0x0640) for type B. The second time it is sent with ID 1595 (0x063B) for type A and ID 1603 (0x0643) for type B. The second time all bytes excluding byte 7 are inverted. Byte 7 has the fix value 170 (hex AA) in the second message.
[v1-00] 2015-Apr-01 Document Feedback HLS-440P − Electrical Interface Figure 7: CAN Matrix Message Layout HLS-440P System: H2ES Receiver Name: A: H2 Exhaust Sensor B: H2 Ambient Sensor ID: (hex) A: 0x638 B:0x640 Datalengthcode: 8 Interrupt: no Rev. 3.3 Transceive: Tx Remote: no Repetition rate: 100 ms MSB LSB variables short name datatype resolutio n phys. range / unit raw range no value b7 b6 b5 b4 b3 b2 b1 b0 Byte-No. Status Sensor not ready H2ES_not_ready bit b0 Byte 1 Error Category H2ES_Err_Cat 2 bit b2 b1 EMC correction active H2ES_EMC_Corr bit b3 negative drift info H2ES_neg_drift1 bit b4 negative drift warning H2ES_neg_drift2 bit b5 negative drift alarm H2ES_neg_drift3 bit b6 Error 5 bit x HW Version Type H2ES_HW_Type 2 bit 1 0 0 b7 b6 Byte 5 HW revision H2ES_HW_Rev 6 bit 1 0 .. 63 0 .. 63 b5 b4 b3 b2 b1 b0 Byte 5 Msg Counter H2ES_Count byte 1 0 .. 127 0 .. 127 255 to be incremented each message ! Byte 6 Safety Byte - CRC Byte 0 .. Byte 6 H2ES_Safety byte 1 0.. 255 Byte 7 Definition Error Category : Code Name Description
0 No Error H2ES Sensor OK
1 Performance Error General function still given (e.g. tolerance range may be increased to 1 % vol.) 2 Slight functional error General function still given but h igh likelihood for upcoming severe error (sensor should be replaced) 3 Severe functional error Severe error, general function NOT given anymore, sensor not longer trustable (= signal not available) Definition HW Version Type : Code Name Description
0 H2ES Type A H2 Exhaust Sensor
1 H2AS H2 Anode Sensor
2 H2S H2 Ambient Sensor
3 H2ES Type B H2 Stack Module Vent Sensor
[v1-00] 2015-Apr-01 Document Feedback HLS-440P − Electrical Interface Figure 10: Definition of Error Category Bit 3: EMC_Corr...EMC correction active Value: 0 or 1 Bit 4: Negative drift info. If this bit is set, the prediction has gone below the first of three warning levels. Bit 5: Negative drift warning. If this bit is set, the prediction has gone below the second warning level. Bit 6: Negative drift alarm. If th is bit is set, the prediction has gone below the third warning level. Bit 7 is not used. Byte 4 Software Version Y .Z Figure 11: Byte 4 Software Version Numbering Code This byte shows the firmware version. View: Y.Z Range: 0 - 255 (Hexadecimal 0 - FF) Value: 0.0 - 15.15 (Hexadecimal 0.0 - F.F) Code Name Description
0 No error Sensor OK
1 Performance error General function still given; Warm start-up indication (<5 s)
2 Slight functional error General function still given but high likelihood for
upcoming severe error (sensor should be replaced)
3 Severe functional error Severe error, general function NOT given anymore, sensor
not longer trustable (=signal not available) Bit MSB 7 6 5 4 3 2 1 LSB B y t e 4 YYYYXXXX
Document Feedback [v1-00] 2015-Apr-01 HLS-440P − Electrical Interface Byte 5 Hardware Version Figure 12: Byte 5 Hardware Version Numbering Code This byte is divided into two parts. The first part shows the hardware type Figure 13: Definition of HW Version Type Range: 0 - 3 here 0 The second part of byte 5 shows the revision of the hardware. Range: 0 - 63 Byte 6 Msg Counter Figure 14: Byte 6 Message Counter Order The Msg Counter byte number s the CAN-messages and is incremented by 1 with each (non-inverted) message Range: 0 - 127 (0 - 7F) Value: 0 - 127 After reaching the value 127 the counter starts from 0 again. Bit MSB 7 6 5 4 3 2 1 LSB Code Name Description
0 HLS-440P type A H2 Exhaust Sensor (H2ES Type A)
1H P S - 1 0 0 H2 Anode Sensor (H2AS)
2 H2 Ambient Sensor (H2S)
3 HLS-440P type B H2 Stack Module vent Sensor (H2ES Type B)
[v1-00] 2015-Apr-01 Document Feedback HLS-440P − Electrical Interface Byte 7 Safety Byte CRC Figure 15: Byte 7 Safety Byte Order The CRC byte shows the 7-bit CRC over byte 0-6 with the Polynomial 0xE5. PWM This section describes the PWM outp ut that is available in some variants of HLS-440P . Physical Interface The electrical connector is the sa me as in the variants with CAN bus interface (see Electrical Connector ). Type A has a termination resistor while type B does not. The PWM signal is created as a differential CAN signal on pin 3 and 4. A CAN signal is said to be in a dominant state when the signal lines are separated (a domi nant bit is transmitted). When the signal lines are at the same voltage level, the state is recessive. Recommended circuitry to convert CAN signals to TTL is specified in a separate document, available on request. The PWM signal is only an output signal. No other transmitting devices should be attached to the bus. The PWM Signal The PWM signal has a period time of 255 μs. The rather short period is chosen since modern CAN transceivers do not allow for a longer dominant state. The duration of the recessive state can be translated into output H2 prediction from the sensor module. The recessive duration (pulse width) ranges from 20 to 220 μs, which corresponds to 0 to 10% hydrogen. An error is shown as a 10 μs pulse width. At startup the pulse width will be 255 μs (100% duty cycle) until the first valid H 2 concentration is delivered after 5 s. The figure below shows the output for 0% hydrogen (pulse width of 20 μs). Bit MSB 7 6 5 4 3 2 1 LSB B y t e 7 XXXXXXXX
[v1-00] 2015-Apr-01 Document Feedback HLS-440P − Specifications Figure 18: Typical Characteristics Description Value Sensor Function Target gas Hydrogen Concentration range 0 – 10 Vol% H2 in air Accuracy ± 0.5% vol. (1) Resolution 500 ppm Speed of response (t90) <5 s Speed of recovery <5 s Cross-sensitivity None towards HC, H2S, N2, CO, CO2, NOx Humidity correction by subtracting 0.6% for type A (2) Humidity correction by subtracting 0.3% for type B (2) Start-up time 5 s Expected lifetime 10 years (1) Safety Explosion proof Designed to fulfill Zone 2 requirements according to ATEX 100a Self test/Error handling Yes Electrical Supply voltage 8.5 – 16 V Supply current 70 mA typical @ 13.8 V and 20 ºC, increased current during start-up phase (avg. 200 mA during first 1s) CAN interface Version 2.0 ISO 11898 Connector A2105404381 - Code A Mating Connector MQS 4-pin, AMP 1-967640-1 Code A ESD/Reverse polarity Yes Specifications
Document Feedback [v1-00] 2015-Apr-01 HLS-440P − Specifications Note(s) and/or Footnote(s): 1. Preliminary values 2. Default offset compensation for humidity range. The figure below describes the specification of the different variants of HLS-440P Figure 19: Specification of the Different Variants of HLS-440P Environmental Operation temperature range -40ºC to 90ºC Storage temperature range -50ºC to 95ºC Humidity 5 – 100% including condensation (1) Pressure 0.5 – 1.2 bar(a) EMC Automotive requirements Mechanical Dimensions (L, Ø) L=93.5mm Ø = 30mm Weight 77g Stud M14x1.5 in acc. to ISO 6149-3 alt. cord size: 2.4 ± 0.08 mm Material Stainless steel and PBT GF30 Filter membrane Pall SUPOR 450R, 0.45 μm. IP code IP6K7 and IP6K9K Part Number Default On Request CAN interface Version 2.0 ISO 11898 - PWM output - Yes T y p e ABAB Description Value
[v1-00] 2015-Apr-01 Document Feedback HLS-440P − Handling Instructions Due to the fact that the sensor element consists of a silicon chip facing the surrounding the following precautions have to be taken into account: During storage and handling avoid:
- Humidity (condensing conditions)
- Dropping (sensor must be replaced if dropped)
- Dust (especially if cap is removed)
- Mechanical impact (especially the entrance membrane)
- Electromagnetic radiation (RF fields, high magnetic fields) In case of storage and transport it is recommended to keep the sensor within its original pa ckaging (plastic cap and ESD protected bubble bag). The disassembly of any parts is not allowed, except for the removal of the plastic cap directly before final assembly. Handling Instructions
[v1-00] 2015-Apr-01 Document Feedback HLS-440P − Mechanical Information Dimensions Figure 22: Sensor Dimensions Note(s) and/or Footnote(s): 1. Dimensions are in millimeters. Mechanical Information GreenRoHS
Document Feedback [v1-00] 2015-Apr-01 HLS-440P − Ordering & Contact Information Figure 23:
Ordering Information
Note(s) and/or Footnote(s): 1. High humidity conditions. 2. Ambient humidity conditions. 3. For availability of other variants contact ams. Buy our products or get free samples online at: www.ams.com/ICdirect Technical Support is available at: www.ams.com/Technical-Support Provide feedback about this document at: www.ams.com/Document-Feedback For further information and requests, e-mail us at: ams_sales@ams.com For sales offices, distributors and representatives, please visit: www.ams.com/contact Headquarters ams AG Tobelbaderstrasse 30
8141 Unterpremstaetten
Austria, Europe Tel: +43 (0) 3136 500 0 Website: www.ams.com Ordering Code Type Delivery Form Delivery Quantity HLS-440P A (1) CAN (500 kbit/s) (3) Individually Wrapped Single Item HLS-440P B (2) CAN (500 kbit/s) (3) Individually Wrapped Single Item Ordering & Contact Information
[v1-00] 2015-Apr-01 Document Feedback HLS-440P − RoHS Compliant & ams Green Statement RoHS: The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specif ied lead-free processes. ams Green (RoHS compliant and no Sb/Br): ams Green defines that in addition to RoHS compliance, our products are free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material). Important Information: The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are unde rway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to prov ide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. RoHS Compliant & ams Green Statement
Document Feedback [v1-00] 2015-Apr-01 HLS-440P − Copyrights & Disclaimer Copyright ams AG, Tobelbader Strasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. Devices sold by ams AG are covered by the warranty and patent indemnification provisions appe aring in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding th e information set forth herein. ams AG reserves the right to ch ange specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with ams AG for current information. This product is intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications , such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams AG for each application. This product is provided by ams AG “AS IS” and any express or implied wa rranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. ams AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any th ird party shall arise or flow out of ams AG rendering of technical or other services. Copyrights & Disclaimer
[v1-00] 2015-Apr-01 Document Feedback HLS-440P − Document Status Document Status Product Status Definition Product Preview Pre-Development Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice Preliminary Datasheet Pre-Production Information in this datasheet is based on products in the design, validation or qualification phase of development. The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice Datasheet Production Information in this datasheet is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade Datasheet (discontinued) Discontinued Information in this datasheet is based on products which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade, but these products have been superseded and should not be used for new designs Document Status
Document Feedback [v1-00] 2015-Apr-01 HLS-440P − Revision Information Note(s) and/or Footnote(s): 1. Page and figure numbers for the previous version may diff er from page and figure numbers in the current revision. 2. Correction of typographical er rors is not explicitly mentioned. Changes from (2014-Dec) to current revision 1-00 (2015-Apr-01) Page Content of Applied Sensor datasheet was updated to the latest ams design Revision Information
[v1-00] 2015-Apr-01 Document Feedback HLS-440P − Content Guide
1 General Description
1 Key Benefits & Features
2 Applications
2 Block Diagram
4 Installation
5 Electrical Interface
5 Electrical Connector
6 CAN Bus Interface
6P h y s i c a l I n t e r f a c e
6 CAN Matrix HLS440P
7 Byte 0 H2_Concentration
8 Byte 1 Status
9 Byte 4 Software Version Y.Z